[Vwdiesel] Oil Pressure

[James Hansen]

Nick said it all. Can't be the pressure relief, pump might be worn, and a
rebuild might net you a few psi, but intermed bearings are the most likely
culprit.
Maybe try a stiffer grade of oil and an oil change, and see if that boosts
your oil pressure enough to make the squeakers not squeak.
As long as you have low loading at low pressure times, you're good. You only
need 10psi for each 1000 rpm anyway to handle full rated bearing loads, so
less at mild driving is fine.

We all want one like Nicks, 70mpg at 15psi sounds pretty good with fuel
priced at what it is...
Lol
-j

-----Original Message-----
From: vwdiesel-bounces at vwfans.com [mailto:vwdiesel-bounces at vwfans.com] On
Behalf Of Chris Geiser
Sent: May-09-11 9:49 AM
To: vwdiesel at vwfans.com
Subject: [Vwdiesel] Oil Pressure

Hi guys (and any gals?);

My 92 Ecodiesel with 380K miles on it:  last week the oil pressure light and
warning buzzer started flashing / sounding while driving.  This is a
"2-stage" oil pressure warning system.  There is a low (idle) sensor that
looks for a bare minimum then turns off.  Then there is a "dynamic" sensor
that looks for oil pressure to be above 1.2 bar when you hit 2000 rpm.  It's
this second dynamic sensor that is causing the warning.

I've trouble shot the warning system / senders and it appears that the
warning is NOT faulty - I don't think I have the tools to measure oil
pressure directly, but I've used my electrical tool with two known dynamic
sensors plus the original sensor and the sensors don't open until well above
2000 rpm's (again - no way to measure RPM's, but engine is turning pretty
quick before switch opens).  When I manually ground the wire, the buzzer
turns off.  So I read that as a working warning system, yes?

I don't see any leaks / puddles, oil level is fine, engine temp is fine
while running.  I did drive it about 40 minutes on the highway to get it
home when the buzzer started (after I didn't see anything catastrophic under
the hood), so there's enough oil pressure in the short term to keep it
running.

So my question to you collective smart people is this:
Are there any easy / relatively cheap fixes or diagnostics that I should
consider on this engine?
Anything that I should check before I decide that the engine is tired and
pressure issues are because engine wear or intermediate shaft bearing
doesn't allow it to hold pressure?
I don't want to put a lot into an engine with that many miles on it, so
thought I'd ask you guys before looking for a long block or different
vehicle... but it still started even in the coldest winter days this year,
so I think compression is still good, although I haven't measured that
either.

Thanks in advance!!  You guys are the best!!

Chris
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